Nostradamus has always seemed a little too vague to me.
Maybe the Baha'i prophecies have made my standards too high, though.
I mean after reading something like "within two years a spark will rise from the Balkans and set the whole world on fire" from 'Abdu'l Baha, which outlines clear times and locations and worldwide implications, the comparatively vague prophecies of Nostradamus just don't seem as impressive to me.
I think that was Nostradamus's method. They sounded extremely vague so that they could be applied to various situations. They are so vague that they could be fulfilled in many different ways, even if the intent he personally made them for didn't pan out.
Basically in my opinion he made them so vague so that it'd be hard to say they did or didn't come true.
I agree, his prophesies were very vague, an art mastered by the best horoscope writers of today!
I haven't read anything by Nostrodamus for some years but recall reading that he was searching for a way to change base metals into gold and that some of his writings may also be his encoded formulae on how one may do this. I personally doubt he cracked that riddle either.